Floor-surfacing machine



June 29,1926.` 1 1,590,671 J. A. CAMPBELL FLOOR SURFACING MACHINE lFiled August 2. 1924 lun,

l Patented June 29, 192,6.,

4UNITED STATES 1,590,671 PATENT OFFICE.

JOHN CAMPBELL, 01\, QUINGY, MASSACHUSETTS.

FLOOR-SURFACIN G MACHINE Application filed August 2, 19.24. .Serial No.729,715.

The object of thisinventionis to providev 'a simple, durable, quietlyrunning machine of light weight adapted to quickly impart a desirablesurface to a floor. The machine of my invention is preferably adaptedtopolish a waxed wooden floor, although it may be adapted, ashereinafter described, to

preparatory to polish- Figure 6 is a view similar to a portion of Figure5 showing one of the platform arms, the lbearing supported thereby beingree moved.

Thefsame reference characters indicate the same parts in all thefigures.

In the drawings 12 designates a platform having at its rear end twodownwardly pro` jecting lower ears 13 and an upwardly proi Ajectingupper ear 14, and at its forward end two forwardly projecting spacedapart arms 15. f v

-'Inserted in orifices in the lower ears 13 is an axle 16 `on .which aremounted two traction wheels 17 constituting rolling supl ports on whichthe platform is oscillatable to raise and lower the arms 15.

18 designates a handle hinged tothe upper ear 14 -by a pintle 19inserted 'in orifices the ear 14, the bolt being provided with aclampingnut 24 (Figure 4). `Wh en the nut is tightened the operator grasplng thehandle may Aswing .the arms 15 either upf ward or downward to varv thepressure of the 'surfacing tool hereinafter described n a fioor, and toremove the tool from the floor when the machine 'is being transportedwithout action.

Mounted on the ends vof asurfacing tool shaft 25, are bearingspreferably provided by concentric annular members 26 and-27,

between which are interposed anti-friction' rolling members 28, as shownby Figure 3. '.lhe inner members 26 receive 'shouldered ]ournal portionsat the ends of the shaft 25.

The outer members 27 are fitted in sockets with which the arms 15 areprovided. Said sokets include fixed lower members 29 formed on thearms,as shown vby Figures 5 and 6, and upper members 30 detachablysecured by screws 31 to the arms 15. Thev members 29 and 30` form.circular sockets ,conforming to the outer bearing members 4ures 3,5'and l6) and open at the inner sides of the arms.

The bearing members 26 and 27 inserted in the sockets are confinedagainst Outwardl movement by the closed ends ofthe sockets and againstinward movement by thekshoulders at the inner ends of the journalportions of theshaft.l Y v Y .To the tool shaft 25 is fixed acylindrical surfacing tool, the construction of which depends on thecharacter of the surface to be formed thereby on a floor. When themachine is. adapted topolish woodenfloors, which is its Vmore importantfunction, the surfacing tool is a cylindrical brush composed of a rigidhub 35 (Figure 3) fixed, as by keys 36, to the shaft 2,5, and bristles37 of any suitable material fixed to and radiating from the hub, theouter ends of the bristles 'forming a cylindrical periphery. The showingof the tool in Figure 3 is somewhat onventional and it will beunderstood \t 'at there may be' any suitable connection between the huband the bristles.

A motor 38, preferably a .1A H. P. 40 degree Gr. E. motoris boltedto theplatform 12, the latter being provided with holes 39 (Figure 5) for thereception ofthe attach- .ing bolts.Y The driving shaft 40 of the motoris-connected with' the tool shaft 2 5 by driving connections preferablyembodied in a sprocket wheel 41 fixed to the driving p60 bearing members26 and 27 are shaft, a sprocketwheel 42 xed to the tool shaft, and adrive chain 43 connecting said wheels. l

A portion of the cable 44 which supplies l current to the motor mayextend through aportion of the handle. When the machine is not. in use,the free end portion of the cable may be stored on hooks 45v on thehandle, as shown by Figure 2. j

The arrangement is such that the motor exerts downward'pressure on thetool. This pressure may be Y varied by the operator through the handle,and the handle may be held in position to raise the'tool from the floorwhen the machine is being inoperatively transported.

The machine preferably comprises also a hood composedof an arched bodyportion 47 covering the upper portion of the periphery ofthe tool andend portions 48 covering the upper portions of the ends of the tool. asshown by Figures 2 and-3.- The hood is provided with a fiange 49attached by screws 50 (Figure l) to the forward portionof the platform.Hood extensions overhanging the lower portions of the ends of the toolare provided by dowlmrdly projectingl ears 51 formed on the arms l5. Aguard 52 covering the exposed portions 80 of the sprocket wheels anddrive chain, .is 'secured by a bracket 53 to the platform and by abracket 54 to one of the end portions 48 of thehood, t-he brackets beingscrewed or bolted to the platform and hood e-nd.

The machine may be adapted for scrubbing floors by substituting for thebrush a scrubbin roll adapted to be used with Water for rapily cleansingfloor surfaces. The machine may also be adapted for dressing floors byabrasion, Without the'use of water` by substituting for the brush asanding roll which may consist of a cylindrical body and `a facing ofsand paper -secured thereto. lIn either case', the hub portion of thetool is engaged lWith the shaft 2521s shown by Figure 3. The removal ofthe upper members 30"p ermits the removal of the shaft and the bearingmembers 26 and 27 from the sockets on the arms. vThe bearing members may.50 then be removed from one end of the shaft to'bear on the floorbehind the tool and prevent the scattering of dust and water.

It will now be seen that when the upper socket members- 30 are removed,and the pfced on the journal portions of the tool vshaft-25,

said bearing members and journaljportions may be deposited in the lowersocket members 29, and then secured bv the. attachment of the uppersocket members to the arms. The bearin members are secured againstinward endwlse movement byI the shoulders, at the inner ends of thejournal portions, and the bearing members and the shaft are securedagainst endwise movement in either direction, by the closed ends of thesockets. Provision is therefore made for conveniently removing a tooladapted for a given kind of Work, and substituting therefor another tooladapted for a difi'erentkind of Work,

The closed ends of the sockets prevent the admission of dust, raised bythe tool, to the outer ends of the bearing members. The(inner ends ofthe sockets are closed by end portions of the tool, said end portionsincluding the end ofthehub shown at the left in Figure 3, closing theinner end of one ofl vthe sockets, and the sprocket Wheel 42 which isarranged to close the open end of the other socket. Dust raised by thetool is therefore excluded from the inner ends of the sockets. Thisexclusion of dust is an important -factor in a floor-surfacing machine,particularly when the tool is adapted to abrade the surface of a. dryfloor.

I' claim A floor-surfacing machine comprising a Wheeled carrying frameincluding spaced apart arms, sockets on the arms having closed outerends at the outer sides-of and integral with the arms, and open innerends at the inner sides of the arms, a rotary tool adapted to act on afloor and includln a hub, a shaft fixed to the hub and pro-vied withshouldered journal portions projecting from the hub,and a driving wheelfixed to the shaft and bearing-on one end of the hub, a motor on theframe, connections betweeny e motor and driving wheel on the tool shaft,annular bearing members mounted on the journal 'l ortions of thetoolshaft and inserted, wit the'journal-i'portions, 1n sald sockets,.thebearing being confined a ainst inward movement-bythe shoulders o thejournal portions ofthe .tool shaft, and against outward movement by theclosed ends of the sockets, said closed ends exclud-J in dust raised bythe tool from the outer en s ofthe bearing members, theV open ends ofthe being closed- .by an endportion of thef'tool hub, and by the drivingwheel -so-that dust raisedby the. tooljis excluded .from the inner ofthe bearing members; H

In. testimony whereof I-have aixed my 120 si ature.-

. JOHN A. CAMPBELL.

